{ config, lib, pkgs, ... }: with lib; let cfg = config.services.ezpw; in { options.services.ezpw = { enable = mkEnableOption "Enable pipewire"; lowLatency = mkOption { type = types.bool; description = "Enable low latency configuration"; default = true; }; usbSoundcard = mkOption { type = types.bool; description = "Doubles the audio rate for alsa outputs in low latency mode"; default = false; }; periodSize = mkOption { type = types.int; description = '' Pipewire period size in low latency mode ("tweak by trial-and-error")''; default = 32; }; rate = mkOption { type = types.int; description = "Pipewire rate in low latency mode"; default = 48000; }; quantum = mkOption { type = types.int; description = "Pipewire quantum in low latency mode"; default = 32; }; }; config = let qr = "${toString cfg.quantum}/${toString cfg.rate}"; in mkIf cfg.enable { hardware.pulseaudio.enable = lib.mkDefault false; services.pipewire = { enable = lib.mkDefault true; jack.enable = lib.mkDefault true; alsa.enable = lib.mkDefault true; alsa.support32Bit = lib.mkDefault true; pulse.enable = lib.mkDefault true; wireplumber.enable = lib.mkDefault true; }; environment.systemPackages = with pkgs; [ # pactl is required for pipewire-pulse pulseaudio ]; services.pipewire.extraConfig.pipewire."92-low-latency" = mkIf cfg.lowLatency { context.properties = { default.clock.rate = cfg.rate; default.clock.quantum = cfg.quantum; default.clock.min-quantum = cfg.quantum; default.clock.max-quantum = cfg.quantum; }; }; services.pipewire.extraConfig.pipewire-pulse."92-low-latency" = mkIf cfg.lowLatency { context.modules = [ { name = "libpipewire-module-protocol-pulse"; args = { pulse.min.req = qr; pulse.default.req = qr; pulse.max.req = qr; pulse.min.quantum = qr; pulse.max.quantum = qr; }; } ]; stream.properties = { node.latency = qr; resample.quality = 1; }; }; services.pipewire.wireplumber.configPackages = [ (pkgs.writeTextDir "share/wireplumber/bluetooth.lua.d/51-bluez-config.lua" '' bluez_monitor.properties = { ["bluez5.enable-sbc-xq"] = true, ["bluez5.enable-msbc"] = true, ["bluez5.enable-hw-volume"] = true, ["bluez5.headset-roles"] = "[ hsp_hs hsp_ag hfp_hf hfp_ag ]" } '') ] ++ optional cfg.lowLatency (pkgs.writeTextDir "share/wireplumber/main.lua.d/99-alsa-lowlatency.lua" '' alsa_monitor.rules = { { matches = {{{ "node.name", "matches", "alsa_output.*" }}}; apply_properties = { ["audio.format"] = "S32LE", ["audio.rate"] = "${toString (cfg.rate * ( if cfg.usbSoundcard then 2 else 1 ))}", -- for USB soundcards it should be twice your desired rate ["api.alsa.period-size"] = ${toString cfg.periodSize}, -- defaults to 1024, tweak by trial-and-error -- ["api.alsa.disable-batch"] = true, -- generally, USB soundcards use the batch mode }, }, } ''); }; }